#include <stdio.h>

union data{
    int a;
    char b;
    int c;
};

struct data2{
    int a;
    char b;
    int c;
};

int main()
{
    union data data1;
    struct data2 data2;
    data1.a=1;
    data1.b='c';
    data1.c = 100;
    printf("%d\n",data1.a);
    printf("%d\n",data1.b);
    printf("%d\n",data1.c);
    printf("%d\n",sizeof(data2));
    return 0;
}